Use this chart as a general guide to sizing the Shoei X-Fifteen. If your measurements do not fit one of these stock sizes or you have questions, please call or write 775-355-0655 or tom@sierrabmw.com. Thank you.
Installed one side but the lower hole wouldn't line up quite enough. Lower hole offset about .5mm off. This contributed to the bolt not threading quite right and shaving some of the threads off mounting bracket. Going to drill hole a little larger to allow screw to grab what threads are left. Sierra is great shop. This bracket not the quality for the $$$.